Hi Sunil,
I'm sorry, I only have a basic knowledge of coding. Not sure what you want me to do with that exactly. I've also gone to the forum you've linked but I've tried most of the suggestions and nothing works.
I was facing the same issue and this suggestion helped. Indeed, there was some issue in the JS.
Hi,
This issue often happens when file permissions or folder ownership are not set correctly in the media directory. Make sure the media and var folders have the right permissions (for example 755 for folders, 644 for files).
Also check if your server is blocking the upload due to size limits — increasing upload_max_filesize and post_max_size in php.ini can help.
Older versions rely on Flash for uploads, so switching to the "single file" option in the admin panel may solve it.